Mug cap



FIG. 1 is a top perspective view of a mug, showing our new design;

FIG. 2 is a bottom perspective view of the mug cap;

FIG. 3 is a front view of the mug cap;

FIG. 4 is a rear view of the mug cap;

FIG. 5 is a right side view of the mug cap;

FIG. 6 is a left side view of the mug cap;

FIG. 7 is a top view of the mug cap; and,

FIG. 8 is a bottom view of the mug cap.

The broken lines represent portions of the mug cap that form no part of the claimed design. 

CLAIM The ornamental design for a mug cap, as shown and described. 